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Search Results: 1 - 10 of 61708 matches for " Carlos Teixeira;Medeiros "
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Caracteriza??o do diagnóstico tardio do cancer de boca no estado de Alagoas
Santos, Luiz Carlos Oliveira dos;Batista, Olívio de Medeiros;Cangussu, Maria Cristina Teixeira;
Brazilian Journal of Otorhinolaryngology , 2010, DOI: 10.1590/S1808-86942010000400002
Abstract: oral cancer in brazil still presents high levels of incidence and mortality bearing different traits throughout the national territory. in most of the cases the diagnosis is late; however there is a great possibility for cure when treated early on. aim: to assess factors associated with the late diagnosis of oral cancer in the state of alagoas. material and methods: a prospective cross-sectional study was carried out in 74 patients, all of them diagnosed with oral squamous cell carcinoma in a hospital of alagoas, between july of 2007 and september of 2008. a semi-structured interview was given, obtaining socio-demographic data, the type of professional help sought, symptom onset, referrals and tumor clinical stage at the moment of diagnosis. results: according to the results obtained in this study, the patients usually sought professional medical help, rather than dental help when a lesion in the mouth appeared, being always referred to a specialist by the dentist, in advanced stages of the disease. conclusions: this study suggests the need for continued education programs for the population and professionals aiming at the early identification of symptoms of the illness; however needing further studies.
Evaluation of the adhesion strength of diamond films brazed on K-10 type hard metal
Santos Sérgio Ivan dos,Casanova Carlos Alberto Medeiros,Teixeira Cleiton Rodrigues,Balzaretti Naira Maria
Materials Research , 2004,
Abstract: The coating of cutting tools with diamond films considerably increases the tool performance due to the combination of the unique tribological properties of diamond with the bulk properties of the substrate (toughness). The tool performance, however, is strongly related to the adhesion strength between the film and the substrate. In this work our main goal was to propose and to test a procedure, based on a tensile strength test, to evaluate the adhesion strength of a diamond wafer brazed on a hard metal substrate, taking into account the effect of the brazing temperature and time. The temperature range studied was from 800 to 980 °C and the brazing time ranged from 3 to 40 min. The obtained results could be used to optimize the costs and time required to the production of high performance cutting tools with brazed diamond wafers.
On the diversity of mollusc intermediate hosts of Angiostrongylus costaricensis Morera & Cespedes, 1971 in southern Brazil
Teixeira, Carlos Graeff;Thiengo, Silvana C.;Thome, José Willibaldo;Medeiros, Aline Bueno;Camillo-Coura, Lea;Agostini, Aventino A.;
Memórias do Instituto Oswaldo Cruz , 1993, DOI: 10.1590/S0074-02761993000300020
Abstract: veronicellid slugs are considered the most important intermediate hosts of angiostrongylus costaricensis, an intra-arterial nematode of rodents. studies undertaken in three localities in southern brazil led to identification of molluscs other than veronicellid slugs as hosts of a. costaricensis: limax maximus, limax flavus and bradybaena similaris. these data indicate a low host specificity of larval stages of a. costaricensis, as it has been reported to other congeneric species.
Oral cancer: population sample of the state of Alagoas at a reference hospital
Santos, Luiz Carlos Oliveira dos;Cangussu, Maria Cristina Teixeira;Batista, Olívio de Medeiros;Santos, Jadileide Pereira dos;
Brazilian Journal of Otorhinolaryngology , 2009, DOI: 10.1590/S1808-86942009000400010
Abstract: the incidence and mortality of oral cancer in brazil remains high; the disease manifests varying features throughout the country. aim: to analyze the epidemiology of oral cancer, including the prevalence, type and site of lesions, the distribution in the state of alagoas, staging, treatment, and social and demographic aspects. material and methods: a descriptive retrospective study was carried out. data were gathered from records of a hospital in alagoas from january 2000 to december 2006. results: of 396 cases (100% of the sample), 62.70% were male and 37.30% female. most tumors were on the tongue. the mean age was 61.95 years (sd=14.56 years), and 95.2% of the sample were aged over 40 years. most of lesions were stage ii (57.04%). radiotherapy was the most common treatment. conclusion: this study revealed the epidemiology of oral cancer patients at a reference hospital in the state of alagoas. the results showed that oral cancer occurs mostly in males in the sixth decade of life; the most common site is the tongue, followed by the floor of the mouth.
Transloca o de bactérias marcadas com Tc99 na icterícia obstrutiva em ratos
Alencar Suelene Suassuna Silvestre de,Medeiros Aldo da Cunha,Brandt Carlos Teixeira,Aguiar José Lamartine de Andrade
Acta Cirurgica Brasileira , 2002,
Abstract: Estudo realizado com o objetivo de avaliar a transloca o bacteriana (TB) do tubo gastrointestinal para órg os viscerais na icterícia obstrutiva. Quatro grupos de ratos foram estudados: grupo I (n=10) ligadura do colédoco, grupo II (n=10) controle ou "sham operation", grupo III (n=12) ligadura do colédoco e gavagem com 99mTc-Escherichia coli e grupo IV (n=5) controle ou "sham operation" e gavagem com 99mTc-E.coli. Usando técnica asséptica e sob anestesia com pentobarbital sódico (20mg/kg), os animais foram submetidos à laparotomia e nos ratos dos grupos I e III foi realizada ligadura do colédoco com fio de seda no 000. Nos ratos dos grupos II e IV foi feita apenas a manipula o do colédoco com pin a de Adison. Após sete dias, os animais dos grupos I e II foram mortos e ressecados fígado, ba o, linfonodos mesentéricos e pulm es para exame microbiológico (meios Agar-sangue e Agar Mac Conkey) e exame histopatológico (colora o H.E. e Tricr mico de Masson) por análise morfométrica. Nos animais dos grupos III e IV, após sete dias, foi administrada por via oral (gavagem) 99mTc-E.coli e após 24h, os ratos de ambos os grupos foram mortos e seus órg os retirados para contagem da radioatividade em cintilador automático Gama, modelo ANSR (ABBOT). O nível médio de bilirrubina, nos grupos ictéricos, foi significantemente maior do que o do grupo controle. O estudo microbiológico revelou maior incidência de bactérias translocadas no grupo I, comparada ao controle (p< 0,05). Os resultados n o mostraram diferen a significante na capta o da 99mTc-E.coli entre os dois grupos. Porém, a análise das intera es grupo x órg o mostrou diferen a entre os grupos ictérico e controle para os órg os: fígado e pulm o. Os dados permitem concluir que em ratos ictéricos por ligadura do colédoco ocorreu TB detectável por exame microbiológico. N o ocorreu TB com 99mTc-E. coli no modelo proposto.
Comportamento de ovinos em gesta??o e lacta??o sob pastejo em diferentes estádios fenológicos de azevém anual
Pedroso, Carlos Eduardo da Silva;Medeiros, Renato Borges de;Silva, Marcelo Abreu da;Jornada, Jo?o Batista Jornada da;Saibro, Jo?o Carlos de;Teixeira, José Roberto Funck;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000500028
Abstract: this work was carried out at the field to evaluate the grazing sheep behavior conducted in annual ryegrass (lolium multiflorum lam.) on vegetative, pre-flowering and flowering stages. ewes at the end of pregnancy and at the beginning of lactation maintained in a 1.3 ha paddock were evaluated in terms of grazing time, bite rate, bite size, leaf:stem ratio of ingested pasture estimated by hand-plucking method. daily grazing time/h of 9.65, 10.97 and 10.68, bite rates/min of 52.65, 51.93 and 40.63 and the bite weight g/bite of 0.064, 0.055 and 0.048 were observed for vegetative (vs), pre-flowering (ps) and flowering stages (fe), respectively. this behavior resulted in forage intake rates of 4.48%, 3.91% and 2.72% of body weight on vs, ps an fs, respectively these evolutions were accompanied by reduction of the leaf:stem ratio of available forage (4.36:1, 1.11:1 and 0.17:1) which were in accordance to the qualitative limitation that occurs in the flowering stage. these data showed that until pre-flowering stage, the strategies desenvolved by the animals allowed an adequate intake forage, while that in the flowering stage the low quality pasture determinated a decrease intake, being this considerate insufficient to attend nutritional necessities of lactating ewes and respective lambs.
Produ??o de ovinos em gesta??o e lacta??o sob pastejo em diferentes estádios fenológicos de azevém anual
Pedroso, Carlos Eduardo da Silva;Medeiros, Renato Borges de;Silva, Marcelo Abreu da;Jornada, Jo?o Batista Jornada da;Saibro, Jo?o Carlos de;Teixeira, José Roberto Funck;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000500029
Abstract: the study was carried out in an experimental area of 5.41 ha, split in four paddocks of similar size. the performance of corriedale breed animals at the end of pregnancy and at the beginning of lactation were evaluated from july 3 to november 18, 2000 under grazing in three phenological stages of annual ryegrass (lolium multiflorum lam.): vegetative (e1), pre-flowering (e2) and flowering (e3). the animals were maintained in a continuous grazing, with variable stocking rates aiming at maintaining an offer of dry matter (dm) around 15% of live weight (lw). the live weight gain (lwg), average daily gain (adg) and the stocking rates were determined. the results showed a dm offer of green leaves of 7.2% of lw, whereas at e3 the percentage of stems and dead material were higher, limiting the animal selective action. this continuous decrease in pasture quality was also recorded for crude protein percentage, that decreased from 23.7% in e1 to 19.4% in e3 and in vitro organic matter digestibility, which decreased from 80.55% in e1 to 60.70% in e3. in response to this pasture condition, it was observed a satisfactory adg as much for sheep (103 g and 87 g) as for lambs (289 g and 279 g) in the vegetative and in the pre-flowering stages. however, at the flowering stage, the daily gain decreased for sheep (-112 g) and lambs (89 g). these results showed the high potential of the annual ryegrass in terms of live weight gain at the vegetative (225 kg/ha) and at the pre-flowering stages (145 kg/ha). however the forage quality reduction at the flowering stage do not allowed its utilization for animal of high nutrient requirement.
Bacterial translocation in rats nonfunctioning diverted distal colon
Pinto Júnior, Francisco Edilson Leite;Brandt, Carlos Teixeira;Medeiros, Aldo da Cunha;Oliveira, Ariano José Freitas de;Jer?nimo, Selma Maria;Brito, Helena Marques Fonseca de;
Acta Cirurgica Brasileira , 2007, DOI: 10.1590/S0102-86502007000300007
Abstract: purpose: to investigate whether the alterations of the diverted colon segment mucosa, evidenced in fecal colitis, would be able to alter bacterial translocation (bt). methods: sixty-two wistar male rats ranging from 220 to 320 grams of weight, were divided in two groups: a (colostomy) and b (control), with 31 animals each one. in group a, all animals underwent end colostomy, one stoma, in ascending colon; and in the 70th pod was injected in five rats, by rectal route diverted segment - 2ml of a 0.9% saline solution in animals (a1 subgroup); in eight it was inoculated, by rectal route, 2ml of a solution containing escherichia coli atcc 25922 (american type culture collection), in a concentration of 108 colony forming unit for milliliters (cfu/ml) - a2 subgroup; in ten animals the same solution of e. coli was inoculated, in a concentration of 1011 cfu/ml (a3 subgroup); and in eight it was collected part of the mucus found in the diverted distal colonic segment for neutral sugars and total proteins dosage (a4 subgroup). the animals from the group b underwent the same procedures of group a, but with differences in the colostomy confection. in rats from subgroups a1, a2, a3, b1, b2, and b3 2ml of blood were aspirated from the heart, and fragments from mesenteric lymphatic nodule, liver, spleen, lung and kidney taken for microbiological analysis, after their death. this analysis consisted of evidencing the presence of e. coli atcc 25922 cfu. mann-whitney and anova tests were applied as analytic techniques for association of variables. results: the occurrence of bt was evidenced only in those animals in which inoculated concentration of e. coli atcc 25922, reached levels of 1011cfu/ml, i.e. in subgroups a3 and b3, although, being significantly greater (80%) in those animals without colostomy (subgroup b3) when compared to the ones with colostomy (20%) from the subgroup a3 (p <0.05). lung, liver and mesenteric lymphatic nodules were the tissues with larger percentile of bac
Translocation of 99mTc labelled bacteria after intestinal ischemia and reperfusion
Jo?o, Samir Assi;Alencar, Suelene Suassuna Silvestre de;Medeiros, Aldo da Cunha;Diniz, Simone Otília Fernandes;Cardoso, Valbert Nascimento;Brandt, Carlos Teixeira;
Acta Cirurgica Brasileira , 2004, DOI: 10.1590/S0102-86502004000400003
Abstract: purpose: ischemia and reperfusion of the small intestine disrupts gut barrier, causes bacterial translocation and activates inflammatory responses. an experimental study was planned to evaluate if 99mtc labelled escherichia coli translocates to mesenteric lymph nodes, liver, spleen, lung and serum of rats submitted to mesenteric ischemia/reperfusion. additionally, it was observed if the time of reperfusion influences the level of translocation. methods: forty male wistar rats underwent 45 minutes of gut ischemia by occlusion of the superior mesenteric artery. the translocation of labelled bacteria to different organs and portal serum was determined in rats reperfused for 30 minutes, 24 hours, sham(s) and controls(c), using radioactivity count and colony forming units/g (cfu). results: all the organs from rats observed for 24 hours after reperfusion had higher levels of radioactivity and positive cultures (cfu) than did the organs of rats reperfused for 30 minutes, c and s, except in the spleen (p<0,01). conclusion: the results of this study indicated that intestinal ischemia/reperfusion led to bacterial translocation, mostly after 24 hours of reperfusion.
Transloca??o de bactérias marcadas com Tc99 na icterícia obstrutiva em ratos
Alencar, Suelene Suassuna Silvestre de;Medeiros, Aldo da Cunha;Brandt, Carlos Teixeira;Aguiar, José Lamartine de Andrade;Rocha, Keyla Borges Ferreira;Silva, Marli Pinheiro da;
Acta Cirurgica Brasileira , 2002, DOI: 10.1590/S0102-86502002000700010
Abstract: this study was designed to evaluate the bacterial translocation (tb) from the gastrointestinal tract to visceral organs in rats submitted to laparotomy and common bile duct ligation (cbdl). four groups of rats were studied: group i (n=10) cbdl; group ii (n=10) control or "sham operation"; group iii (n=12) cbdl and 99mtc-e.coli and group iv (n=5) control or "sham operation" e 99mtc-e.coli. all the animals were operated with aseptic technic under intraperitoneal anesthesia with pentobarbital sodium (20mg/kg). on 7th postoperative day the animals of groups i and ii were killed with a letal dosis of anesthetic and the liver, spleen, mesenteric lynphnodes and lungs were ressecated to microbiological (agar-blood and agar-mac conkey) and histological examination (h.e. and masson trichromic) through morphometric analysis. on 7th postoperative day the animals of iii and iv groups were labeled with 99mtc-e.coli gavage and after 24hr they were killed and their organs were ressected. after that, the bacterial radioactivity was measured through an automatic count of gama radioative - model ansr (abott laboratories). the mean bilirrubin levels of the jaundiced rats were significantly higher as compared with the control group. the incidence of bacterial translocation was higher in group i compared with control group (p< 0.05). the results showed no significant statistic differences of 99mtc-e.coli distribution between the two groups (p<0.05). however the interactive analyses groups x organs showed significant differences among the jaundiced and control groups to the liver and lungs. the data allow to conclude that in jaundiced rat with ligated bile duct occurred bacterial translocation detectable through microbiological analyses. the model proposed showed no bacterial translocation by the labeled 99mtc technic.
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